To see bug, drag ship down with finger (grabbing invisible area behind the ship) all the way past taskbar to hit bottom boundary. Ship will still be at original 270 degree angle (can test this w/ textbox). R control (dragging right pylon w/ touch or mouse click) won't work at this position (the mas lower boundary), even though it should, as the condition includes the 270 degree angle for R (right) control to work and between angles includes the indicated angles per manual.

Construct 2 is mature software; we've fixed thousands of bugs over the 6 years it's been released. These days, genuinely over half of all bug reports are just mistakes in events. We can't deal with thousands of reports if we have to sift through hundreds of events every time, so we hold everyone to the bug report requiremenets. It's not just you, we do this routinely. The linked thread explains the rationale in detail.

At most 19 events could be taken out of that (F control and L control). You can toggle those groups disabled if it helps. But everything else is necessary to replicate the bug.

Ship orientation is necessary in there, so you can test, that if you change the angle just a bit up, then R control works, but it should work at the default 270 degrees w/ the coding scheme.

But the bug appears also when utilizing the other controls at the upper screen boundary when you flip the ship around.So drag it up at default 270 degrees. Flip it 180 by touching outside on screen, and then try left right, and again, bug appears.

So I really don't know what you want me to take out of there or if anything can be taken out without testing comprehensively.